, the u.s., france, britain, germany, china, and russia all represented. negotiators keeping pretty tight lipped here, but they do acknowledge making some concessions and iran's chief nuclear negotiator is letting a couple of items slip, for example, take a listen to what he said when cnn asked whether negotiators want iran to shut down its uranium enrichment. >> our nuclear facilities are working under the supervision of the iaea. there is no -- to be shut down. they have paid attention to this point. therefore, it is considered from our point of view a positive step. >> iran says it is enriching uranium for quote/unquote peaceful needs. >>> want to go to mars? it could happen, maybe in 2018. that is when a nonprofit group headed by this millionaire, and also the first space tourist, dennis tito, hopes to launch a spacecraft carrying two people, he wants them to be married, to fly by the red planet. he announced the proposed mission just this afternoon. >> again, it is uses low earth orbit architecture. and we just adapt it to a -- in effect, a very large earth orbit that leaves earth an
